from itertools import cycle
from shutil import get_terminal_size
from threading import Thread
from time import sleep


class Loader:
    def __init__(self, desc="Loading...", end="Done!", timeout=0.1, color="\033[92m"):
        """
        A loader-like context manager

        Args:
            desc (str, optional): The loader's description. Defaults to "Loading...".
            end (str, optional): Final print. Defaults to "Done!".
            timeout (float, optional): Sleep time between prints. Defaults to 0.1.
        """
        self.desc = desc
        self.end = end
        self.timeout = timeout
        self.color = color
        self._thread = Thread(target=self._animate, daemon=True)
        self.steps = ["▣", "▦", "▥", "▨", "▤", "▧", "▩"]
        self.done = False

    def start(self):
        self._thread.start()
        return self

    def _animate(self):
        for c in cycle(self.steps):
            if self.done:
                break
            print(f"\r{self.color}{self.desc} {c}", flush=True, end="")
            sleep(self.timeout)

    def __enter__(self):
        self.start()

    def stop(self, state=True):
        self.done = True
        if state == True:
            cols = get_terminal_size((80, 20)).columns
            print("\r" + " " * cols, end="", flush=True)
            print(f"\r{self.end}\033[0m", flush=True)

    def __exit__(self, exc_type, exc_value, tb):
        self.stop()
